Search

Leveraging in-network caching of proposed future network architectures such as content-centric networking (CCN) encourages users and ISPs to enjoy performance improvements of networks. However, we raise an argument against a rule of thumb stating that more content storage is better since business relationships in inter-domain networks are based on profit negotiations rather than an efficiently deployed network architecture. The objective of this paper is to identify the optimal cache allowance for a caching mechanism in CCN in inter-domain networks. We propose an incentive model for ISPs and analyze their maximum profits by studying the effects of cache allowance in their routers. The results confirmed from our analysis indicate that the minimum expected round-trip time can be achieved by deploying the maximum cache allowance in all routers. In contrast, the maximum cache allowance in the router connected to clients and the minimum cache allowance in the gateway router of an ISP that connects to the clients provides the maximum profit to that ISP. On the other hand, the maximum cache allowance in the gateway router of an ISP that is connected to clients and the minimum cache allowance in the router close to the server provides the highest profit to an ISP connected to the server.